-# - spec default value for --with-replicators (=internal/shared/none, configure default is none)?
-# (also internal vs shared for lvm1,pool,cluster,snapshots,mirrors,raid,replicators,thin,cache;
-# note: dmeventd requires mirrors=internal)
+# - internal vs shared for snapshots,mirrors,thin,cache ?
+# note: dmeventd requires mirrors=internal)